Tire-filling compound and process involving the same.



' UNITED STATES,

HOWARD I. MANLEZ, 011' ansas orrY, MISSOURI.

TIRE-FILLING ooMrouNn nun i nocnss INVOLVING THE SAME.

No Drawing.

To all whom it may concern:

Be it known. that L'Howxno I. lilixnnr, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missourhhave invented certain new and useful Improvements in "Tire-Filling Compounds and Processes Involving the Same, of which the following is a specifica tion.

While it has been proposed heretofore to provide pneumatic tires with a filler consisting of an elastic or resilient body whereby the tire may be rendered puncture proof, so far as I am aware, no chemical compound. or composition for the above purpose has been successful commercially. Those compositions heretofore evolved have ordinarily been serviceable only temporarily because of .the deterioration or decomposition of the chemical substances arising from changes in Weather conditions, and especially variation of heat and cold, such conditions causing the tiller to lose its resiliency or elasticity, which is absolutely necessary if it is to perform the function desired.

It has been my object. in producing the process and composition of the present invention, to obtain a tire filling: compound which will last practically as long as the tire into which it is placed and retain throughout its life the resiliency necessary for a commercial article of this nature.

While one or more of the elements of my composition have heretofore been used, so for I know, the peculiar combination of ingredients employed by me and the manner of compounding the sameby the special process described, is novel.

- The filler compound of my invention compriscsa mixture of the following ingredients Gelatin 40%, potassium bichromate K ,Cr.,() 19%, balsam of fir 8%, glycerin 40%, fine cork 5%.

I employ a special process in compounding the above admixture, the gelatin and glycerin and balsam of fir being heated for a period of about five minutes, after Which the fine cork is stirred in the mixture. As

soon as the cork has become thoroughly- Specification of Letters'latent.

Application filed June 8, 1811. Serial Nol 631,558.

Patented Apr. 30, 1912.

and that the entire mixture When ready shall not be exposed to light or air.

It has been impossible thus far to determine the exact nature of the chemical action or reaction Which takes place in the forma necessity of immediately excluding the tiller from the action of light and air, after add ing the potassium bichromate, leads me to believe that the special process employed by me is a vital factor in enabling my compound to answer the demands of commercial usage. lVhether the exclusion of the filler from the action of air and light after the admixture of the potassium bichromate advantageously retards any reaction incidental. to the combination of the various ingredients, or causes-a certain reaction derived from the hot state of the mixture When the potassium bichromateis combined therewith, I cannot say. -But the provision of excluding light. from the mixture after the potassium hichromate has been added will insure the maintenance of the mixture in a fluid state for some time after it has been mate has the property o1": hardening and rendering insoluble the gelatin only when This will allow the tiller mixtu e to penetrate to a certain depth. the material of the tire, before it sets to a spongy or firm elastic consistency, such initial penetration of the tire by the filler and its subsequent set ting conjointly resulting in a higher degree of adhesion of the filler and tire body. The setting of the filler to a firm spongy condition may be brought about by a possible chemical reaction of the ingredients acting conjointly with the action of the bichromate of potassium in rendering insoluble the gelamount of light which. could penetrate the poroustire body to its interior. However, the product resulting has been used commercially for a considerable length of time and not only maintains its resiliency throughout, but has no tendency to harden, crumble, or deteriorate under the most vaworking conditions.

ditions prescribed, as soon as it is introduced into the tire under pressure, the inaterial begins to unite with the tire by reason prising all of the other ingredients'named,

tion of my product as above described. The

introduced into the tire, since the bichroa mixture of the two is exposed to light.v

atin under the influence of a very small riable atmospheric changes, and exacting If the compound is made under the coni of the fact that the potassium bichromate solution employed has not rendered the gelatin insoluble by virtue of the fact that no light has had access to'the mixture, and the manner of admixture furthermore affords a resilient filler capable of expanding and contracting according to the atmospheric changes.

In the application of the compound to a tire, it is also essential that the material of the compound be forced into the tire under pressure and said pressure maintained until the material has become set and united with the tire proper.

A tire which has been treated by application of a filler made in accordance with the foregoing specification, becomes practically puncture proof While maintaining substantially its original resiliency, a feature of practical and commercial importance in this art.

By reason of the special substances emplayed in providing the tiller the latter will be comparatively light, as will be readily apparent.

The gelatin employed in the compound affords a binder for the other ingredients named.

Having thus described the invention, What is claimed as new is:

1. A process of making a tire filling compound which consists in mixing glycerin with a gelatinous binder While hot. then adding to the hot mixture potassium bichromate, and immediately excluding the resulting product from the action of light and air.

2. A process of making a tire filling compound Which consists 1n mixing gelatin, glycerin and balsam of 1; heating the mixture; then adding to the hot mixture potassium bichromate; excluding the mixture from the action of light and air; and finally filling the mixture into a tire and allowing the same to set.

3. A process of making a filled tire which consists in mixin gelatin, glycerin, and balsam of fir in the approximate-propor tions of forty parts each of gelatin and glycerin and three parts ofbalsam of fir;

heating the mixture for a short time; then adding about five parts of fine cork to the mixture; then adding about twelve parts of potassium bichromate to the mixture; excluding the mixture from the action of light and .air; and finally filling it into a tire and allowing the same to set.

t. A tire filling compound consisting of the following ingredients and combined in substantially the following proportions, to wit :gelatin 40%, glycerin 40%, balsam of fir 3%, fine cork 5%, and potassium bichromate 12%.

In testimony whereof I affix my signature in presence of two witnesses.

HOWARD I. MANLEY.

Witnesses: I i

H. W. 'MGNUTT, WM. STEPHENS. 

